Spoiler : This particular episode seems to be beyond belief. Briefly, it tells the story of of the search for a missing 10 year old boy. Eight months later the boy is found hundreds of miles away and returned to Los Angeles. Everyone believes it the boy, and so does the grandfather who has been taking care of and living with him for years. All the kids and families of the neighborhood accept that he is the boy because he looks exactly like the boy and knows everything about his past. However, very soon the grandfather doesn't believe it his grandson. In the end, the grandfather was right and this boy is is an imposter. I have listened to tens of Dragnet and Gangbusters shows, but this one, if real, is utterly incredible and I would like to research it further.